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阔叶红松林是东北东部最主要的林分类型,如何获取相应的林分结构信息是森林保护和可持续经营的重要内容。2011年,在吉林省蛟河试验局林场建立了1个面积为30hm2的阔叶红松林永久样地,并对样地内的每株树木测量了坐标、胸径和树高等。本文运用结构多样性指数(角尺度、大小比数、混交度)研究了该林分的空间结构。该样地的平均混交度值为0.590,平均角尺度为0.569,各个树种大小比数值介于0.36到0.94之间。这表明:张广才岭阔叶红松林树种空间配置稍高于中度混交水平,树种在垂直方向上分化明显,林分总体上呈聚集分布格局。研究结果可为森林的可持续经营提供借鉴。
Broad-leaved Korean pine forest is the most important stand type in the eastern part of Northeast China. How to obtain the corresponding stand structure information is an important part of forest protection and sustainable management. In 2011, a permanent site of broad-leaved Korean pine forest with an area of 30hm2 was established in the forest farm of Jiaohe Bureau of Jilin Province, and the coordinates, DBH and tree height of each tree in the site were measured. In this paper, the spatial structure of the forest stand was studied by means of structural diversity index (angular scale, size ratio, mixed degree). The average value of hybridity was 0.590, the average angular scale was 0.569, and the ratio of size to tree size was 0.36 to 0.94. This indicates that the spatial distribution of broad-leaved Korean pine forests in Zhangguangcai Mountains is slightly higher than that of medium-level hybrids. The tree species are highly differentiated in the vertical direction and the stands are aggregated and distributed as a whole. The results can provide reference for the sustainable management of the forest.